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    <title>Document</title>
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<body>
    <script>
     //数组排序
     //1.数组翻转
     var arr = [1,2,3,4];
     arr.reverse();
     console.log(arr);
     //2.数组排序(冒泡排序)
     var arr1 = [13, 5, 22, 16];
     arr1.sort(function(a,b){
         //return a - b 升序排列
         return b - a  //降序排列
     });
     console.log(arr1);

     var arr2 = [3, 1, 6, 9, 34, 22, 11];
     arr2.sort(function(a,b){
         return b - a
     });
     arr2.reverse();
     console.log(arr2)
    </script>
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